4fb0a3bc69e28cbb418020d609344d3df117202b1add4db63e00802cc1b8be2d

Analysis

max time kernel
94s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 01:42

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General

Target

760d23b3faaa09c480f5ece99a58ce49.dll
Size

112KB
MD5

760d23b3faaa09c480f5ece99a58ce49
SHA1

c420b0d0a51e56cac4fbb24d3f4fb23c31b1abe0
SHA256

4fb0a3bc69e28cbb418020d609344d3df117202b1add4db63e00802cc1b8be2d
SHA512

80a0c05ac2b86db3853defe887a8d5a2769b41c28357afa4fbbe9f0145ac77fab1271ab174c3c8c3ae03d51204a27763b007858e8dcc66aa9ae036b4fc345cd7
SSDEEP

1536:iko0WXKFhaCcArPH+uuZkMsIwS9B/3NRVjT07puERGV9Uzk+ORs0P0D:iR0WX6ha/oPHXuZz9FT07pZG3UERDE

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\DefaultPrinter = "{4388f5ef-78ad-41b6-afb6-1df493c3acc3}"	regsvr32.exe

Loads dropped DLL 2 IoCs

pid	Process
1688	regsvr32.exe
1688	regsvr32.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\Default\DefaultPrinter.dll	regsvr32.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4388f5ef-78ad-41b6-afb6-1df493c3acc3}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4388f5ef-78ad-41b6-afb6-1df493c3acc3}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4388f5ef-78ad-41b6-afb6-1df493c3acc3}\InprocServer32\ = "C:\\Program Files (x86)\\Common Files\\Default\\DefaultPrinter.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4388f5ef-78ad-41b6-afb6-1df493c3acc3}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1688	regsvr32.exe
1688	regsvr32.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1688	regsvr32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1688	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 1688	1740	regsvr32.exe	86
PID 1740 wrote to memory of 1688	1740	regsvr32.exe	86
PID 1740 wrote to memory of 1688	1740	regsvr32.exe	86

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\760d23b3faaa09c480f5ece99a58ce49.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\760d23b3faaa09c480f5ece99a58ce49.dll
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Modifies registry class
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:1688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\Common Files\Default\DefaultPrinter.dll

Filesize
112KB

MD5
760d23b3faaa09c480f5ece99a58ce49

SHA1
c420b0d0a51e56cac4fbb24d3f4fb23c31b1abe0

SHA256
4fb0a3bc69e28cbb418020d609344d3df117202b1add4db63e00802cc1b8be2d

SHA512
80a0c05ac2b86db3853defe887a8d5a2769b41c28357afa4fbbe9f0145ac77fab1271ab174c3c8c3ae03d51204a27763b007858e8dcc66aa9ae036b4fc345cd7

Download Submit
memory/1688-5-0x0000000000990000-0x00000000009AC000-memory.dmp

Filesize
112KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads